Improvement in railroad-car ventilators



NrfrED STATES EArEEfr GEEIGE.

IMPROVEMENT IN RAILROAD-CAR VENTILATORS.

Specification forming part of Letters Patent No. 117,289, dated July 25,1871.

city and county of Hartford and State of Connecticut, have made aninvention of a new and useful Ventilator, suitable for railroad cars andand for other purposes; and that the following is a full, clear, andexact description and specification ofthe same.

rIhe object of the invention is to exhaust air by the action of acurrent of air that is lateral to the direction in which the air isto beexhausted, whether the acting current be in one direction or in theopposite direction, without the -necessity of adjusting any part of theventilator, so that the ventilator may produce the exhaustion of airfrom the side of a car, whichever end ofthe latter may be moved forward,without the necessity of moving any part of the ventilator to adapt itto the change of direction of the exhausting current of air. To thisend, my invention consists of a ventilator, which is a dat case havingan aperture at one side for the admission of airlaterally to itsinterior, a second aperture for the discharge of air in a verticaldirection, two deectors inclined vertically in opposite directions todirect a ciu'rent of air across the discharging-apertiu-e, a guard whichboth protects the discharge-aperture from vertical currents and guidesthe exhausting current across the said aperture, and a plate whichcloses the outer side of the apparatus.

In order that my invention may be fully understood, I have representedin the accompanying drawing' a ventilator embodying it in the best format present known to me.

Figure 1 represents the outer side of said ventilator. Fig. 2 representsthe Ainner side of the same. Fig. 3 represents one edge of the same.

Fig. 4 represents a transverse section of the same at the line a: x ofFig. 3, looking toward the receiving-aperture.

The inner side A ofthe ventilator represented is constructed with thereceiving-apertin'e Z), by which the air to be exhausted is admittedinto a cavity in the implement formed by the two deflectors C C and thecurved top D of the case which connects the deflectors. The deieotors CG are inclined vertically in opposite directions, and are separated attheir nearest points bythe discharge-aperture e. Opposite thisdischargeaperture is the wind-guard F, Which is, by preference,constructed in the form represented in the drawing, so that each of itsends g, in connection with the opposite delector C, forms a flaringmouth to receive the exhausting current. The outer side of the centralcavity is closed by a iiat plate, H, which completes the case audprevents external currents from entering the ventilator except at thefront or rear edges thereof.

The apparatus thus described may be applied to the side of a car or tothe roof thereof with either the side m or the side n uppermost. Ifapplied with the side m uppermost the guard F should be perforated withone or more slits, h, to permit rain-water to escape; and if appliedwith the side a uppermost one or more slits should be made in the curvedtop (which then becomes the bottom of the apparatus) for the samepurpose. When the ventilator thus constructed is applied to an aperturein the side of the raised roof of a railroad car, and the car is movedin the direction represented by the arrow w, Fig. 4, the current ofexternal air enters the forward edge of the ventilator in the directionofthe arrows x, and, being deflected in a vertical direction, isdirected by the guard F across the discharge-aperture e and escapes atthe rear ofthe ventilator. The current thus passed across thedischargeaperture induces a current through that aperture, andconsequently through the receivingaperture b from the car, which islateral to the external current entering the ventilator. If thedirection in which the car is moved be reversed the external currententers at the edge fr and escapes at the opposite edge, but the currentis induced through the discharge-aperture as before.

The apparatus may be entirely constructed of tin plate, and consequentlyat a small cost.

I claim as my invention- The ventilator, constructed, as beforedescribed, with a receiving-aperture at one side, two deflectorsinclined vertically in opposite directions, a discharge-aperture betweenthe ends of said deiiectors, a directing-guard for thedischarge-aperture, and the outer plate.

Witness my hand this 31st day of May, A. D.

JAMES vL. HOWARD.

Witnesses GEO. G. BARNES, ALBERT L. BURKE.

